46 |
|
findmaterial(register OBJREC *o) |
47 |
|
{ |
48 |
|
while (!ismaterial(o->otype)) { |
49 |
– |
if (ismixture(o->otype)) |
50 |
– |
return(NULL); /* reject mixed materials */ |
49 |
|
if (o->otype == MOD_ALIAS && o->oargs.nsargs) { |
50 |
|
OBJECT aobj; |
51 |
|
OBJREC *ao; |
55 |
|
ao = objptr(aobj); |
56 |
|
if (ismaterial(ao->otype)) |
57 |
|
return(ao); |
58 |
+ |
if (ao->otype == MOD_ALIAS) { |
59 |
+ |
o = ao; |
60 |
+ |
continue; |
61 |
+ |
} |
62 |
|
} |
63 |
|
if (o->omod == OVOID) |
64 |
|
return(NULL); |
65 |
|
o = objptr(o->omod); |
66 |
|
} |
67 |
< |
return(o); |
67 |
> |
return(o); /* mixtures will return NULL */ |
68 |
|
} |
69 |
|
|
70 |
|
|
86 |
|
continue; |
87 |
|
/* find material */ |
88 |
|
m = findmaterial(objptr(o->omod)); |
89 |
< |
if (m == NULL || !islight(m->otype)) |
89 |
> |
if (m == NULL) |
90 |
> |
continue; |
91 |
> |
if (m->otype == MAT_CLIP) { |
92 |
> |
markclip(m); /* special case for antimatter */ |
93 |
> |
continue; |
94 |
> |
} |
95 |
> |
if (!islight(m->otype)) |
96 |
|
continue; /* not source modifier */ |
97 |
|
|
98 |
|
if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 : |
187 |
|
double d; /* distance to source */ |
188 |
|
register SRCREC *srcp; |
189 |
|
|
190 |
< |
rayorigin(sr, r, SHADOW, 1.0); /* ignore limits */ |
190 |
> |
rayorigin(sr, SHADOW, r, NULL); /* ignore limits */ |
191 |
|
|
192 |
|
while ((d = nextssamp(sr, si)) != 0.0) { |
193 |
|
sr->rsrc = si->sn; /* remember source */ |
258 |
|
} |
259 |
|
|
260 |
|
|
261 |
+ |
static int |
262 |
+ |
transillum( /* check if material is transparent illum */ |
263 |
+ |
OBJECT obj |
264 |
+ |
) |
265 |
+ |
{ |
266 |
+ |
OBJREC *m = findmaterial(objptr(obj)); |
267 |
+ |
|
268 |
+ |
if (m == NULL) |
269 |
+ |
return(1); |
270 |
+ |
if (m->otype != MAT_ILLUM) |
271 |
+ |
return(0); |
272 |
+ |
return(!m->oargs.nsargs || !strcmp(m->oargs.sarg[0], VOIDID)); |
273 |
+ |
} |
274 |
+ |
|
275 |
+ |
|
276 |
|
extern int |
277 |
|
sourcehit( /* check to see if ray hit distant source */ |
278 |
|
register RAY *r |
279 |
|
) |
280 |
|
{ |
281 |
+ |
int glowsrc = -1; |
282 |
+ |
int transrc = -1; |
283 |
|
int first, last; |
284 |
|
register int i; |
285 |
|
|
288 |
|
} else { /* otherwise check all */ |
289 |
|
first = 0; last = nsources-1; |
290 |
|
} |
291 |
< |
for (i = first; i <= last; i++) |
292 |
< |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT) |
293 |
< |
/* |
294 |
< |
* Check to see if ray is within |
295 |
< |
* solid angle of source. |
296 |
< |
*/ |
297 |
< |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
298 |
< |
<= source[i].ss2) { |
299 |
< |
r->ro = source[i].so; |
300 |
< |
if (!(source[i].sflags & SSKIP)) |
301 |
< |
break; |
302 |
< |
} |
303 |
< |
|
304 |
< |
if (r->ro != NULL) { |
305 |
< |
r->robj = objndx(r->ro); |
306 |
< |
for (i = 0; i < 3; i++) |
307 |
< |
r->ron[i] = -r->rdir[i]; |
308 |
< |
r->rod = 1.0; |
309 |
< |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
310 |
< |
r->uv[0] = r->uv[1] = 0.0; |
311 |
< |
r->rox = NULL; |
312 |
< |
return(1); |
291 |
> |
for (i = first; i <= last; i++) { |
292 |
> |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) != SDISTANT) |
293 |
> |
continue; |
294 |
> |
/* |
295 |
> |
* Check to see if ray is within |
296 |
> |
* solid angle of source. |
297 |
> |
*/ |
298 |
> |
if (2.*PI*(1. - DOT(source[i].sloc,r->rdir)) > source[i].ss2) |
299 |
> |
continue; |
300 |
> |
/* is it the only possibility? */ |
301 |
> |
if (first == last) { |
302 |
> |
r->ro = source[i].so; |
303 |
> |
break; |
304 |
> |
} |
305 |
> |
/* |
306 |
> |
* If it's a glow or transparent illum, just remember it. |
307 |
> |
*/ |
308 |
> |
if (source[i].sflags & SSKIP) { |
309 |
> |
if (glowsrc < 0) |
310 |
> |
glowsrc = i; |
311 |
> |
continue; |
312 |
> |
} |
313 |
> |
if (transillum(source[i].so->omod)) { |
314 |
> |
if (transrc < 0) |
315 |
> |
transrc = i; |
316 |
> |
continue; |
317 |
> |
} |
318 |
> |
r->ro = source[i].so; /* otherwise, use first hit */ |
319 |
> |
break; |
320 |
|
} |
321 |
< |
return(0); |
321 |
> |
/* |
322 |
> |
* Do we need fallback? |
323 |
> |
*/ |
324 |
> |
if (r->ro == NULL) { |
325 |
> |
if (transrc >= 0 && r->crtype & (AMBIENT|SPECULAR)) |
326 |
> |
return(0); /* avoid overcounting */ |
327 |
> |
if (glowsrc >= 0) |
328 |
> |
r->ro = source[glowsrc].so; |
329 |
> |
else |
330 |
> |
return(0); /* nothing usable */ |
331 |
> |
} |
332 |
> |
/* |
333 |
> |
* Make assignments. |
334 |
> |
*/ |
335 |
> |
r->robj = objndx(r->ro); |
336 |
> |
for (i = 0; i < 3; i++) |
337 |
> |
r->ron[i] = -r->rdir[i]; |
338 |
> |
r->rod = 1.0; |
339 |
> |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
340 |
> |
r->uv[0] = r->uv[1] = 0.0; |
341 |
> |
r->rox = NULL; |
342 |
> |
return(1); |
343 |
|
} |
344 |
|
|
345 |
|
|
394 |
|
scp->sno = sr.rsrc; |
395 |
|
/* compute coefficient */ |
396 |
|
(*f)(scp->coef, p, sr.rdir, si.dom); |
397 |
< |
cntord[sn].brt = bright(scp->coef); |
397 |
> |
cntord[sn].brt = intens(scp->coef); |
398 |
|
if (cntord[sn].brt <= 0.0) |
399 |
|
continue; |
400 |
|
#if SHADCACHE |
405 |
|
} |
406 |
|
#endif |
407 |
|
VCOPY(scp->dir, sr.rdir); |
408 |
+ |
copycolor(sr.rcoef, scp->coef); |
409 |
|
/* compute potential */ |
410 |
|
sr.revf = srcvalue; |
411 |
|
rayvalue(&sr); |
412 |
+ |
multcolor(sr.rcol, sr.rcoef); |
413 |
|
copycolor(scp->val, sr.rcol); |
414 |
< |
multcolor(scp->val, scp->coef); |
360 |
< |
cntord[sn].brt = bright(scp->val); |
414 |
> |
cntord[sn].brt = bright(sr.rcol); |
415 |
|
} |
416 |
|
/* sort contributions */ |
417 |
|
qsort(cntord, sn, sizeof(CNTPTR), cntcmp); |
449 |
|
break; |
450 |
|
scp = srccnt + cntord[sn].sndx; |
451 |
|
/* test for hit */ |
452 |
< |
rayorigin(&sr, r, SHADOW, 1.0); |
452 |
> |
rayorigin(&sr, SHADOW, r, NULL); |
453 |
> |
copycolor(sr.rcoef, scp->coef); |
454 |
|
VCOPY(sr.rdir, scp->dir); |
455 |
|
sr.rsrc = scp->sno; |
456 |
|
/* keep statistics */ |
463 |
|
source[scp->sno].sflags & SFOLLOW )) { |
464 |
|
/* follow entire path */ |
465 |
|
raycont(&sr); |
411 |
– |
rayparticipate(&sr); |
466 |
|
if (trace != NULL) |
467 |
|
(*trace)(&sr); /* trace execution */ |
468 |
|
if (bright(sr.rcol) <= FTINY) { |
474 |
|
#endif |
475 |
|
continue; /* missed! */ |
476 |
|
} |
477 |
+ |
rayparticipate(&sr); |
478 |
+ |
multcolor(sr.rcol, sr.rcoef); |
479 |
|
copycolor(scp->val, sr.rcol); |
480 |
< |
multcolor(scp->val, scp->coef); |
480 |
> |
} else if (trace != NULL && |
481 |
> |
(source[scp->sno].sflags & (SDISTANT|SVIRTUAL|SFOLLOW)) |
482 |
> |
== (SDISTANT|SFOLLOW) && |
483 |
> |
sourcehit(&sr) && rayshade(&sr, sr.ro->omod)) { |
484 |
> |
(*trace)(&sr); /* trace execution */ |
485 |
> |
/* skip call to rayparticipate() & scp->val update */ |
486 |
|
} |
487 |
|
/* add contribution if hit */ |
488 |
|
addcolor(r->rcol, scp->val); |
504 |
|
scp = srccnt + cntord[sn].sndx; |
505 |
|
prob = hwt * (double)source[scp->sno].nhits / |
506 |
|
(double)source[scp->sno].ntests; |
507 |
< |
if (prob > 1.0) |
508 |
< |
prob = 1.0; |
448 |
< |
scalecolor(scp->val, prob); |
507 |
> |
if (prob < 1.0) |
508 |
> |
scalecolor(scp->val, prob); |
509 |
|
addcolor(r->rcol, scp->val); |
510 |
|
} |
511 |
|
} |
613 |
|
static int |
614 |
|
weaksrcmat(OBJECT obj) /* identify material */ |
615 |
|
{ |
616 |
< |
OBJREC *o = findmaterial(objptr(obj)); |
616 |
> |
OBJREC *m = findmaterial(objptr(obj)); |
617 |
|
|
618 |
< |
if (o == NULL) return 0; |
619 |
< |
return((o->otype==MAT_ILLUM)|(o->otype==MAT_GLOW)); |
618 |
> |
if (m == NULL) return(0); |
619 |
> |
return((m->otype==MAT_ILLUM) | (m->otype==MAT_GLOW)); |
620 |
|
} |
621 |
|
|
622 |
|
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
684 |
|
) |
685 |
|
{ |
686 |
|
/* check for over-counting */ |
687 |
< |
if (badcomponent(m, r)) |
687 |
> |
if (badcomponent(m, r)) { |
688 |
> |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
689 |
|
return(1); |
690 |
< |
if (wrongsource(m, r)) |
690 |
> |
} |
691 |
> |
if (wrongsource(m, r)) { |
692 |
> |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
693 |
|
return(1); |
694 |
+ |
} |
695 |
|
/* check for passed illum */ |
696 |
|
if (passillum(m, r)) { |
697 |
|
if (m->oargs.nsargs && strcmp(m->oargs.sarg[0], VOIDID)) |
699 |
|
raytrans(r); |
700 |
|
return(1); |
701 |
|
} |
702 |
+ |
/* check for invisibility */ |
703 |
+ |
if (srcignore(m, r)) { |
704 |
+ |
setcolor(r->rcoef, 0.0, 0.0, 0.0); |
705 |
+ |
return(1); |
706 |
+ |
} |
707 |
|
/* otherwise treat as source */ |
708 |
|
/* check for behind */ |
709 |
|
if (r->rod < 0.0) |
641 |
– |
return(1); |
642 |
– |
/* check for invisibility */ |
643 |
– |
if (srcignore(m, r)) |
710 |
|
return(1); |
711 |
|
/* check for outside spot */ |
712 |
|
if (m->otype==MAT_SPOT && spotout(r, makespot(m))) |